Wireless control device



' J. LINDGREN.

WIRELESS CONTROL DEVICE.

APPLICATION FILED MAY is, 1918.

Patented June 7, 1921.

3 SHEETS-SHEET I.

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J. LINDGREN.

' WIRELESS CONTROL DEVICE.

APPLICATIO N FILED MAYI6,.I9I8.

Patented June 7, 1921.

3 SHEETS-SHEET 2.

5% WM m \m I w. m M f i \k Q N m R I \m N. m M. K M mm A NW J. LINDGREN.

WIRELESS CONTROL DEVICE.

APPLICATION FILED MAY 16. 1918.

Patented J 11110 7, 1921.

3 SHEETSSHEET 3.

' rated by comparativel PATENT OFFICE.

JOHN LINDG'REN, 0F LEMONT, ILLINOISI WIRELESS CONTROL nnvron.

Application filed May, 16,

-tion.

The object ofv my invention is to provide electric means forsynchronizing the movement of an armature located at a distance with themovement of an engine located at a control station. Another object of myinvention is to provide wireless means for energizing at will,separately or collectively, one or several magnets at a receivingstation through the operation of switches at a send-. ing station.

In the drawings Figure 1 is a side-elevation of the novel instrumentused by me at the sending station, with connections and otheraccessories indicated by diagram; Fig. 2 is an end-elevation of thenovel instrument shown in Fig. 1; Fig. 3 is a side-elevation of thenovel instrument used by me at the receiving station, with connectionsand other accessories indicated by diagram; Fig. 4 is an end-elevationof the novel instrument shown in Fig. 3; and Fig. 5 is a dia grammaticview illustrating how some of the elements shown in Figs.- 1 to 4 may beused in connection with a wire connection between the sending or controlstation and the receiving station, for the purpose of synchronizing themovement of an armature at the receiving station with the movement of anengine at the sending or control station. 7

Referring to the drawings, at the send-- ing station'there is located acommutator 10, supported bybracket 11. Around this commutator travels abrush 12 which is carried by an arm 13, attached to the end of a shaft14. This shaft is mounted in a bearing 15 and revolved, at a uniformspeed, by any suitable means (not shown). Arm 13 is made integral with ac0llar'16', and together with collar 16, is thoroughly insulated fromshaft 14 bysuitable means. Commutator 10 has, say, five metallicsections, 17, 18, 19, 20 and 21, preferably sepalarge sections 22 ofinsulating material. ections 17, 18, 19, 20 and'21 are connected, bywires 23, 24, 25, 26 and 27, respectively, with a terminal 28 of a radiosending coil 29, the other terminal 30 of which is connected to one ofthe poles Specification of Letters Patent.

1918. Serial No. 234,876.

of batteries 32. The other poleof these batteries is connected toinsulated brush 34 which is in contact -with collar 16. On wires 24, 25,26 and 27 are located switches 35, 36, 37 and 38 which are normallyopen, but are adapted to be closed by the hand of the the operator atthe sending station.

At the receiving station there is located a commutator 39, supported bybracket 40, which is practically a duplicate of commutator 10. With thiscommutator there is held in contact a brush 41 by an arm 42 which isattached to the end of a shaft 43, and which, together with collar 44,integral with arm 42, 1s insulated from shaft 43 by suitable means.

Shaft 43 is mounted in suitable bearings 45 and 46, and carries,thoroughly insulated from it, rings 47 48 and 49, and two pole armature50. With wings 47, 48 and 49 are held in contact, by a suitable support51, brushes 52, 53 and 54,

respectively, all thoroughly insulated from support 51. One end 55 ofthe winding 56 on armature 50 is connected to ring 47, while the otherend 57 of winding 56 is connected to both of rings 48 and 49. Rings 47and 48 are metallic throughout; but ring 49 has a considerable portion58 of its outer rim composed of insulating material, while the largerportion 59 is metallic. A magnet 60 is arranged so that armature 50 islocated between its poles 61 and 62, and is provided with a winding 63through which a suitable constant electric current (from a source notshown) is directed so as to hold armature 50, and consequently rings47,-48 and 49, in the position shown in Fig. 4 when a current passesthrough winding 56 from end 57 to end 55 thereof. Brush 52 isconnectedto a hammer 64 which is normally in contact with a terminal 65,but is adapted to be drawn awayfrom such terminal, and to be brought incontact with a similar terminal 66, by amagnet 67 the winding of whichisat one end connected with brush 54, and also with the positive pole of abattery 69, while at the other end it is connected with a terminal 70,and also with the, negative pole of a battery 71, the positive pole ofwhich is connected to terminal 66. Brush 53 is connected to the positiveole of a battery 72, the negative pole of w ich is connected to terminal65. -The negative pole of battery 69 is connected to a hammer 73,located opposite to terminal 70, and adapted to be brought in' contactwith it by magnet 7 4 the Patented .June 7, 1921.

- and 81, respectively, of commutator 39 (which sections correspond tosections 18, 19, 20 and 21, respectively of commutator 10). The positivepole of battery is connected to a hammer 76 which is adapted to bebrought by'a magnet 82, in contact with a terminal. 83,"which isconnected to a brush 97 held in contact with collar 44 by a bracket 85.The winding on magnet 82 at one end is connected with one terminal 86 ofcoherer87 while at the other end it is connected with the negative poleof a battery 92 the positive pole of which is connected to the otherterminal 93 of coherer 87. Terminal 93 is also connected to aerial 94while to terminal 86 there is also connected grounding wire 95.

The operation of my devices} is as fol- All connections having beenproperly made, all batteries having been properly charged, shaft 14.witharm 13 and brush 12 having been set in motion at a speed of, say, onerevolution in every second, and switches 35, 36, 37 and 38 being open, acurrent is sent through coil 29 from batteries 32 everytime brush 12passes over section 17 of commutator 10, or once every second. Wheneverthis happens coherer 87 v is affected by means of jigacurrents fromaerial 94 passing through it to grounded wire 95, thereby making itpossible for the current from battery 92 likewise to pass throughcoherer 87 and to energize magnet 82. Whenever this happens hammer 76 isbrought into contact with terminal 83, thereby closing the circuit frombattery 7 5 over magnet 74 byyway of brush 97, arm 42, and

ntil thisoccurs hammer 64 is.

section 77. in contact with terminal 65, and a current flows frombattery '72, by way of brush 53 and ring 48 from end 57 toward end 55through coil .56, and throughring 47 and brush 52 back to battery 72,thereb holdin armature 50, and with it rings 4 48 an 49 in the positionshown in Fig. 4. As soon however as magnet 74 is energized by thecurrent from battery 75, hammer 73 is brought into contact with terminal70, and thereby the circuit from battery 69 over magnet 67 is closed,and hammer. 64 is pulled away from terminal 65 and brou ht into contactwith terminal 66, thereby isconnecting the circuit from battery 72through coil 56, with the current running from end57 to end 55, butcausing a current from battery 71 by way of hammer 64,

brush 52, ring 47, ring 49, brush 54 and the windin of magnet 67 to passfrom end 55 to end 5? through coil 56. This reversal of the currentthrough coil 56 will cause instantly a reversal of the poles of armature50, and hence a'half revolution of it. Assuming for the present thatthis revolution will take place in the-direction indicated by arrow 96,it will be seen that at the moment when the half revolution of armature'50 is completed, brush 54 has lost contact with the metallic portion 59of ring 49, and come in contact with non-conducting portion 58 of thatring. This breaks the circuit from battery 71 both through winding 56and the winding of magnet 67, with the result that the normal contactbetween hammer 64 and terminal 65, and thereby the current from battery72 through coil 56, flowing from end 57 to end 55, is reestablished,causing in connection with the momentum acquired by the first half-turn,ar-

mature 50 to complete its revolution and to assume again its normalposition shown in Fig. 4. The apparatus will thereupon be ready torespond again to an impulse from sending coil 29; and since such animpulse will occur every time when brush. 12 passes over section 17,armature 50 will make a revolution coincident with every revolution ofarm 13. If by any chance on the drawing down of hammer 73 by magnet 74,armature 50 should start to turn in the direction opposite to thatindicated by arrow 96, the current from battery 71 would be interrupted,immediately after the starting of the turn, by brush 54 coming incontact with portion 58. This not only would de-' prive armature 50 ofall further impulse to complete the half turn which it started to make,,but would instantly release hammer 64, thereby reestablishing contactof it with terminal 65, and again causing the current from battery 72 toflow through coil '56 from end 57 toward end 55, and hence armature 50to swing back, in the'direct'ion indicated by arrow 96, toward itsoriginal position and beyond it, thence to be turned by the continuouslyrepeated impulses from sending coil 29 in continuous rotation in themanner hereinabove described, in the direction indicated by arrow 96.

When after this continuous rotation of armature 50, in practical unisonwith the rotation of arm 13, is established, any one of switches 35, 36,37 or 38- is closed, then while such switch remains closed, there is oneach turn of arm 13, when brush 12 passes over the segment 18, 19, 20 or21, connected to such switch, a current sent through coil 29 whichinstantly affects coof section 77 and the winding on magnet 74, but isclosed by way of the segment 7 8, 79, 80 or 81-which corresponds to thesegment 18, 19, 20 or 21 through which the current over the closedswitch: or switches 35, 36, 37 or 38 passes, and by way ofthe winding onthe magnet 88, 89, 90 or 91 thus resulting in single or successiveimpulses to any one or more of these magnets at the will of the operatormanipulating switches 35, 36, 37 and 38. These impulses may be utilizedfor the control of various devices by means of magnets 88, 89, 90 or 91,such for instance as the setting and releasing of signals, as will bereadily understood by anyone familiar with the many uses to which suchmagnets may be put.

In the modified construction illustrated by Fig. 5, magnets 88, 89, 90and 91, and the wire connections, leading to them; also magnet 82,terminal 83, hammer 76, aerial 94, coherer 87, and their wireconnections; also sending coil 29, batteries 32, wires 24, 25, 26 and27, and the switches thereon;

also sections 18, 19, 20, 21 and 78, 79, 80.

and 81 are omitted; commutators 10 and 39 are made entirely ofnon-conducting. material, with the sole exceptions of sections 17 and77; and the windmg of magnet 74 is at one end connected with aninsulated brush 34 which is in contact with collar 16, while the otherend is connected to one of the poles of battery 75 the other pole ofwhich in this case is connected with section 17. I

With this modified construction the circuit of battery 75 over thewinding of magnet 74 is closed every time brush 12 comes in contact withsection 17, and opened every time such contact ceases As a resultarmature 50 will be caused, in the manner above described, to makearotation every time shaft 14 makes a rotation, and syn-' chronousmovement of armature 50 with the engine driving shaft 14 willbeestablished. Such movement may probably be used for many differentpurposes, such for instance as the timing of a phonograph to the motionof a 'moving picture machine. It is however not the purpose of thisapplication to set forth the manner of any specific use b of my invetion.

.to cover- I cla1m: 1. In a wireless control device, the combination ofmeans at the sending station forgenerating jig-currents at regularintervals, with an armature rotatable in an' electric field at thereceiving station; means for utilizing the jig-currents to cause apartial rotation of the armature; and automatic means at the receivingstation for completing the rotation of the armature during eachinterval.

2. In a wireless control device, the combination of means at the sendingstation for generating jig-currents at regular intervals, with anarmature rotatable in an electric field at the receiving station; meansgenerating jig-currents at regular intervals,

w1th anarmature rotatable in an electric field at the receiving station;means for,

utilizing such jig-currents to cause a partial rotation of the armature;automatic means at the receiving station for completing the rotation ofthe armature during each such interval; means at the sending station forsending additional jig-currents during any such intervals at regularspecific momerits-of such intervals; and means for utilizing therotation of the armature at the receiving station in connection withsuch additional jig-currents, sent at such regular specific moments ofsuch intervals for temporarily energizing s ecific correspondingmagnets, substantial y as and for the purpose described.

4. In a wireless control device, the combination of means at the sendingstation for generating jig-currents at regular intervals, with anarmature rotatable in an electric field at the receivingv station; meansfor utilizing the jig-currents to cause a reversal,

of thepolarity of such armature; and automatic means at the receivingstation for restoring the original polarity of such arma-' ture duringeach interval.

5. In a wireless control device, thecombination of means at the sendingstation for generating jig-currents at re lar intervals, with anarmature rotatab e in an electric field at'the receiving station; meansforutilizing the jig-currents to cause a par tial rotation of thearmature; automatic means at the receiving station for completing therotation of the' armature durlng each interval; and automatic means forpreventing the armature from' turmng 1n the wrong direction.

6. In an electric control device, the combination of means at thecontrol station for transmitting impulses at regular intervals, With anarmature rotatable in an electric field at the controlled station; meansat the controlled station for utilizing the impulses from the controlstation to cause partial rotation of the armature; and automatic meansat the controlled station for completing the rotation of the armatureduring each interval. 7

7 In an electric control device, the combination of means at the controlstation for transmitting impulses at regular intervals, with an armaturerotatable in an electric field at the controlled station; means at thecontrolled station for utilizing the impulses from the control stationto cause partial rotation of the armature; automatic means at thecontrolled station for completing the rotation of the armature duringeach interval; and automatic means at the controlled station forpreventing the armature from turning in the wrong direction.

8. In electric control devices, the com bination of a motor operated bythe alternate use of two electric batteries; a two-way switch,controlling the currents "from the batteries, normally closing thecircuit of one of the batteries; an electro-magnet controlling theswitch; a circuit for the current from the other battery over thewinding of the-magnet; a circuit for a third current over such winding;means for sending such third current at regular intervals, thereby eachtime closing the switch and reversing the current over the motor; andautomatic means, operated by the motor, for cutting but, on beingclosed, opening such circuit and. closing the circuit of the otherbattery; means for closing such switch at regular intervals, therebyreversing the current over the motor; and automatic means, operated bythe motor, for cutting off the reversed current upon the completion of ahalf revolution of the motor, and for restoring the current over thewinding of the magnet; a

circuit for a third current over such winding; means for sending suchthird current at regular intervals, thereby each time closing the switchand changing the current over the motor; and automatic means operated bythe motor for cutting off the reversed current upon each half revolutionof the motor, thereby releasing the switch and restoring the originalcurrent.

11. In electric control devices, the combination of a motor operated bythe alternate use of two electric batteries; a two-way switch,controlling the currents from the batteries, normally closing thecircuit of one of the batteries; an electro-magnet controlling theswitch; a circuit for the current from the other battery over thewinding of the magnet; a circuit for athird current, flowing in the samedirection, over suchwinding; means for. sending such third current atregular intervals; and automatic means, operated by the motor, forreopening the switch.

JOHN LINDGREN.

Witnesses:

CARL SrRovER, Iva G. WOODEN.

